Home / 156,748.98-216,315.18-85,130.40

Finding the Fourth Proportional to 156,748.98, 216,315.18 and 85,130.40

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Solution

The fourth proportional to 156,748.98, 216,315.18 and 85,130.40 is: 117,480.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,748.98 : 216,315.18 = 85,130.40 : x
  2. Step 2: Convert to fraction form
    156,748.98/216,315.18 = 85,130.40/x
  3. Step 3: Cross multiply
    156,748.98x = 216,315.18 × 85,130.40
  4. Step 4: Simplify right side
    156,748.98x = 18,414,997,799.47
  5. Step 5: Solve for x
    x = 18,414,997,799.47/156,748.98
  6. Step 6: Final answer
    x = 117,480.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.